\documentclass[a4paper,12pt]{article}
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\usepackage{indentfirst} 
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\usepackage[a4paper,%
	includehead,%
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	]{geometry}
\begin{CJK}{UTF8}{gbsn}
  \CJKfamily{hei}
\title{MIMO系统中的VBLAST接收的算法研究}
  \CJKfamily{song}
\author{孙奇 (095177 09级硕士生)\\北京邮电大学信息与系统}
\date{2009/6/28}

\begin{document}
\maketitle
%\tableofcontents
\input{abstract}
\input{intro}
\input{model}
\input{receiver}
\input{sim}
\input{conc}
\begin{center}
hello you are my sweety!
\end{center}
\begin{eqnarray}
	a + b = c
\end{eqnarray}
	$ c + d = 1	 $,	
	today is \today
\begin{equation} \label{eps}
\lambda > 0
\end{equation}
From ~\ref{eps}, we gather \ldots
\subsection{subsection1}
hello,my name is iq!welcome to my world!

this is my first work!so do it good!you need to be thinking ! how to be a person that everyone will like you!

huanhang!
\subsection{subsection2}
this is section 2!
\[\frac{x^2}{y^2+3y+4}  \]
\part{End Of the Test}
\ldots


%\input{title.tex}

\end{CJK}
\end{document}

